How does the mobile phone charge Unicom's mobile phone?

At present, there are various ways to charge phone bills by mobile phones. Many websites can pay phone numbers, but it is recommended to choose the payment method provided by Unicom itself. The specific method is as follows: 1. Unicom's online business hall: After entering the website, select "Charging and Recharge" on the left-"Payment by Mobile Phone/Internet Card"; 2. Unicom Mobile Business Hall: Go to the homepage of Unicom Mobile Business Hall and select "Mobile Payment"; 3. Buy Unicom recharge card and recharge it according to the instructions. You can call the recharge phone, log in to the online business hall, mobile phone business hall, and recharge by SMS. 4. To Unicom business hall, use self-service terminal or manual cash payment.